UltrAspire Big Bronco Lightweight Running Race Vest - Desert Sage, Small (35"-40") W/ 2 x 500mL Softflasks Included

Champion Ultramarathoner Collaboration: The Big Bronco Race Vest was built in collaboration with UltrAspire Elite Athlete and champion ultramarathoner Jeff Browning. ErgoFit - The human body is complex with intricate detail and function. The same attention to detail is present in the design of our packs to enable precise movement, contact, and weight distribution which ensures that there is never any inhibition to the biomechanics of the human body. Configured Pockets for Compatible Bottles: The Big Bronco has a 12 liter capacity and a pocket configuration ready to carry a variety of hydration options including a 2 liter reservoir. The front harness features 4 pockets that are built from 4-way stretch mesh. Bottle Compatible (not included): UltraFlask 550, Formula 250, Human 20 oz 2.0, wL Reservoir 2.0, or Collapsible Bottle. UltrAcool Light Mesh: The UltrAcool Light Mesh on the back panel eliminates any discomfort when fully loaded. Accessing the back compartment is made easier by a soft foam flare which extends up, guiding your hands into position. The back panel also houses a sweat proof pocket. Max O2 Form - For unrestricted breathing while maintaining a stable pack. Uses shock cord with good stretch for unrestricted breathing but also good rebound on the stretch for a stable ride. Patent Pending.